2a07:580:1::/48 - IE-NET-V6
inet6num: 2a07,580,1,,/48 netname: IE-NET-V6 descr: Internet Telecom SRL country: RO admin-c: RR11117-RIPE tech-c: VN2312-RIPE mnt-by: ro-vocalnet-1-mnt mnt-by: AS49469-MNT status: ASSIGNED created: 2016-02-23T08,19,08Z last-modified: 2016-02-23T08,20,51Z source: RIPE role: Vocalnet NOC address: BD. UNIRII NR. 75, BL. H1, SC. 1, ET. 8, AP. 45, SECTOR 3 address: 030832 address: BUCURESTI address: ROMANIA e-mail: email@example.com nic-hdl: VN2312-RIPE mnt-by: AS49469-MNT created: 2016-02-04T14,33,26Z last-modified: 2016-02-22T16,10,52Z source: RIPE person: RALUCA RADUCANU address: BD. UNIRII NR. 75, BL. H1, SC. 1, ET. 8, AP. 45, SECTOR 3 address: 030832 address: BUCURESTI address: ROMANIA phone: +40212047656 nic-hdl: RR11117-RIPE mnt-by: AS49469-MNT created: 2016-02-02T14,53,27Z last-modified: 2016-02-22T16,13,21Z source: RIPE route6: 2a07,580,1,,/48 descr: IE-NET-V6 origin: AS12961 mnt-by: ro-vocalnet-1-mnt mnt-by: AS49469-MNT created: 2016-02-23T08,22,58Z last-modified: 2016-02-23T08,22,58Z source: RIPE
IP address ranges, or netblocks, are groups of related IP addresses. They are usually represented as a base IP address, followed by a slash, and then a netmask which represents how many IP addresses are contained within the netblock. This format is known as CIDR. You'll also sometimes see netblocks given as a start ip address, and an end ip address, or an ip address range.
Traffic works its way around the internet based on the routing table, which contains a list of networks and their associated netblocks.